A car fuse is marked 15A and operates normally on a 12V battery. Calculate the resistance of the fuse wire
Question 1 Report
A car fuse is marked 15A and operates normally on a 12V battery. Calculate the resistance of the fuse wire
Answer Details
The power dissipated by the fuse wire can be calculated using the formula:
Power (P) = Current (I) x Voltage (V)
The current can be calculated using Ohm's law:
V = I x R
where V is the voltage, I is the current, and R is the resistance.
Therefore, we can rewrite the power formula as:
P = (V/R) x V
or
P = V^2 / R
From the given information, the voltage (V) is 12V and the current (I) is 15A. Substituting these values into Ohm's law gives:
12 = 15 x R
Solving for R gives:
R = 12/15
R = 0.8 Ω
Therefore, the correct answer is: 0.8Ω.
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